atc not installed

Try dropping disk #1 in and choosing the repair function.

sorry radarman i tried that already but still it doesent work
❓ i dont get iwhy it wont work ❓

1-Did you do a clean install of the Deluxe or just overwrite your old copy.

2-Did you install SP1 and SP2 yet.

i have done both things but still nothing this is getting very wierd ❗ ❓

I quote:

Microsoft has significantly enhanced the multiplayer options via its "shared skies" concept. Multiplayer has long been a major component of Microsoft's Flight Simulator world, particularly among the hardcore fans--for example, those enthusiasts who would pilot a jumbo jet on an 18-hour flight in real time as a member of a highly organized virtual airline. But as part of its overall push to open Flight Simulator up to the more casual player, Microsoft has made multiplayer simpler to get into, going to a server-based system, adding integrated voice over IP, and incorporating a couple of new features. The first is the ability to have someone fly in the plane with you. This is a great feature for training: An experienced pilot can virtually sit next to you in the cockpit and talk you through, for example, landing in VFR conditions or using advanced navigational controls on a cross-country flight. The other is the previously mentioned ability to join a multiplayer session as the air traffic controller. In this role, you sit in the tower with a visual on the airport and a radar screen in front of you. As in real life, your job is instructing all of the air traffic around you, including takeoff and landing instructions. And as in real life, this is sure to be a high-stress role like at a busy airport.

I would do a clean uninstall.

https://flyawaysimulation.com/news/3805/

The reinstall, if that means so much to you.
Don't forget to defrag before and after you do the new install.